Pump apparatus for ink jet printer
AssigneeSamsung Electronics Co., Ltd.
InventorKarp-sik Youn
Life of this patent
Estimating the term…
Abstract
A pump for an inkjet printer applying a negative pressure to an inkjet head nozzle, includes: a tube connected to the inkjet head nozzle and being U-shaped; a plurality of rollers which contact an inner arch of the tube and having a tapered shape; and a rotor to which the plurality of rollers are rotatably mounted. When the rotor rotates in a direction, at least one of the plurality of rollers rotate and squeeze the tube. When the rotor stops rotating, the plurality of rollers return to a state in which the plurality of rollers do not squeeze the tube due to a recovering force of the tube. The squeezing of the tube generates the negative pressure in the inkjet head nozzle.
Claims19
A pump for an inkjet printer applying a negative pressure to an inkjet head nozzle, comprising:
- a driving gear surrounding a shaft and rotatable in a direction about the shaft and including a stopper integrally formed on a side of the driving gear and having at least one protrusion;
- a ratchet rotatable about the shaft, movable about an axial direction, having one or more cam recesses formed on an upper side each of which receive the at least one protrusion, and having a driving ratchet formed at a lower side;
- a tube connected to the inkjet head nozzle and being U-shaped;
- a plurality of rollers which contact an inner arch of the tube and having a tapered shape;
- and
- a rotor to which the plurality of rollers are rotatably mounted, rotatable about the fixing shaft, movable about an axial direction, and having a driven ratchet formed on an upper side,
- wherein, when the rotor rotates in a direction, at least one of the plurality of rollers rotate and squeeze the tube,
- wherein, when the rotor stops rotating, the plurality of rollers return to a state in which the plurality of rollers do not squeeze the tube due to a recovering force of the tube, and
- wherein the squeezing of the tube generates the negative pressure in the inkjet head nozzle.
A pump for an inkjet printer applying a negative pressure to an inkjet head nozzle, comprising:
- a fixing shaft;
- a driving gear rotatably assembled to the fixing shaft;
- a stopper protruding from a side of the driving gear;
- a ratchet wheel rotatably assembled to the fixing shaft, having a driving ratchet formed in a lower end thereof and a cam recess;
- a rotor assembled to the fixing shaft, movable in an axial direction, and having a driven ratchet formed in an upper end thereof which is engagable with the driving ratchet;
- a plurality of rollers rotatably disposed at the rotor and having tapered sides;
- and
- a tube disposed to contact the plurality of rollers and connected to the inkjet head nozzle,
- wherein the driving gear is rotatable in a direction and rotation of the driving gear causes the rotor to move along the fixing shaft so that at least one of the plurality of rollers squeezes the tube.
A pump which pumps ink from an ink source, comprising:
- a shaft;
- a driving gear surrounding the shaft and rotatable in a direction about the shaft;
- a stopper integrally formed on a side of the driving gear and having at least one protrusion;
- a ratchet rotatable about the shaft, movable about an axial direction, having one or more cam recesses formed on an upper side each of which receive the at least one projection, and having a driving ratchet formed at a lower side;
- a rotor rotatable about the fixing shaft, movable about an axial direction, and having a driven ratchet formed on an upper side;
- and
- two or more rollers extending from a lower side of the rotor and which orbit the shaft when the rotor rotates.
Dependencies are inferred from the claim text.